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Network TheoryNodal Analysis

Two non-reference nodes V1 and V2 are connected by an ideal 5 V source with V1 positive relative to V2. The required voltage constraint is?

  • AV1+V2=5
  • BV1-V2=5
  • CV2-V1=5
  • DV1V2=5
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Correct Answer: B. V1-V2=5
Explanation: The stated polarity means V1 is 5 V higher than V2, hence V1-V2=5 V.
Reference: Standard network theory: supernode constraint
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